The effect of grain-boundary-engineering-type processing on oxygen-induced cracking of IN718

被引：96
作者：
Krupp, U
Kane, WM
Liu, XY
Dueber, O
Laird, C
McMahon, CJ
机构：
[1] Univ Penn, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA
[2] Univ Siegen, Inst Werkstofftech, D-57068 Siegen, Germany
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2003年 / 349卷 / 1-2期
关键词：
oxygen-induced cracking; dynamic embrittlement; grain-boundary engineering; IN718;
D O I：
10.1016/S0921-5093(02)00753-0
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Polycrystalline Ni-base superalloys are prone to time-dependent intergranular failure when the loading temperatures exceeds about 873 K. The fracture process is then controlled by oxygen grain-boundary diffusion followed by decohesion of the respective boundaries. It is shown that this kind of cracking for IN718 at 923 K in air can be reduced significantly by successive steps of deformation and annealing, which is known as grain-boundary-engineering processing. This illustrates the importance of the grain-boundary-character distribution with regard to this mode of failure, which is known as 'dynamic embrittlement.' (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：213 / 217
页数：5
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